Miter-jack.



PATENTED JUNE 12, 1906.

E. O. WOLFE. MITER JACK.

APPLICATION FILED DEC. 28, 1904.

EDWARD O. WOLFE, OF VVILLIAMSPORT, PENNSYLVANIA.

MlTER-JACK- Specification of Letters Patent.

Patented June 12, 1906.

Application filed December 28, 1904. Serial No- 238,668. I

To all whom it may concern:

Be it known that I, EDWARD O. WOLFE, a citizen of the United States, residing at Williamsport, in the county of Lycoming and State of Pennsylvania, have invented certain new and useful Improvements in Miter-Jacks,

of which the following is a specification.

This invention comprises an improved device particularly adapted for mitering boards or the like.

The invention embodies in its organization a clamping device for holding the work in place, means for quickly actuating this device and adjusting the same, and gage mechanism for positioning the work with reference to the clamping means, so that the board or material may be mitered at any desired an-- 1e. g For a full .description of theinvention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accom an in drawings.

While the invention may be adapted to different forms and conditions by changes in the structure and minor details without departing from the spirit or essential features thereof, still the preferred embodiment thereof is shown in the accompanying drawings ,in which- Figure 1 is a perspective view of a device embodying the invention. Fig. 2 is a transverse sectional view taken on the line X X of Fig. 4. Fig. 3 is a transverse section view taken on the line Y Y. of Fig. 1. Fig. 4 is a vertical longitudinal sectional view. Fig. 5 is a transverse sectional view similar to Fig. 3, opposite sets of the teeth 6 being shown.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

Specifically deseribing'the invention, the same consists of a suitable frame 1, adapted to be secured to a support in any substantial manner. The frame 1 is provided at one end thereof with a rigid arm or jaw 2, and a mov-. able jaw 3 is adapted for movement longitudinally of the frame 1 and adjustment at an ascertained point relative to the member 2. The parts 2 and 3 comprise the main clamp members, by which the work is held in position in the mitering o eration. The frame 1 is provided with a suitable guide'for directing the movement of the clamp member 3 teeth 6 in its in the head 8, is

tremity of the member 3 is reduced and'received in the slot 4, the member 3 being held in this position by means of an attachingplate or like device 5. The late or member 5 is located upon the rear sid d of the frame 1 and is secured to the clamp member 3 and movable therewith longitudinally of the frame. The member 3 is operated b means ,of an actuating-bar 6, having swive ed connection-mt one end, as shown at 7, with the said member 3. The bar 6 passes through a head 8, extendingfrom the frame 1, at the extremity opposite that from which the jaw or clamp member 2 projects, and the bar 6 is adapted for free slidable movement through the head 8, because of the provision of suitable devices said bar 6 may be positively positioned with reference to the head 8, and thereby fix the position of the member 3 with reference to its cooperating member 2.

The actuating-bar 6 is peculiarly mounted with reference to the head 8 of the frame 1, said bar bein provided with a lurality of Ten th and having a handle 9 at The bar 6, though mounted directly carried in an adjusting element u on said head 8, said element comprising a s eeve 10, having a central bore or openiifg through which the bar 6 passes, said sleeve being exteriorly threaded, as shown at 11. The head 8 is provided with a threaded opening therethrough, and into this openin the sleeve or adjusting element 10 is a apte to be screwed.- The element 10 is adapted to be interlocked with the bar 6 in order that these two parts may be operated together and the clamp member 3 positively advanced and clamped against the work by the adjustable movement of the sleeve with reference to the head 8. The bar 6, however, is also adapted for free slidable movement in the sleeve 10, and to admit of this movement said sleeve is provided internally with a longitudinal recessed portion 12 of a size suflicient to permit the teeth 6 of the bar 6 to move through the sleeve 10. The recess 12 is of peculiar formation, bein widened at points between the ends of the s eeve 10. The purpose of the formation of the recess 12, as above described, is to admit of the slidable movement of the bar 6 through the sleeve in o crating the clamp member 3, and to further admit of a rotary movement of the bar 6, so that certain of the teeth 6 thereof may be its outer end.

IIO

thrown into the'wider portions of the recess 12 of the sleeve, and these teeth will prevent longitudinal movement of the bar 6 with reference to the head S except with the sleeve. When the teeth 6 of the bar 6-have been interlorked with the sleeve 10, a continued rotary movement of the bar 6 will rotate the sleeve, and the threaded construction of this latter will cause the clamp member 3 to. be ad vanced toward the member 2. The widened portion ofthe recess 12 extends laterally from one side of this recess, so that the bar 6 must be turned in one direction in order to interlock with the sleeve 10. A further rotary movement of the bar in the same direction will effect the adjustment of the member 3, as above mentioned.

The gage device which positions the work to determine the angle of the miter thereof consists, essentially, of a supporting-plate 13, arranged between the members 2 and 3, and approximately of angular format-ion. F astened to a side of the rigid member 2 is an arcuat e guide-plate 14, and an extension 15 projects from a side of the plate 13 and carries an adjusting-screw or like fastening 16. The guide-plate 14 is arcuately slotted, and the adjusting-screw 16 passes through this slot to the extension 15 and is adapted tobe tightened when it is necessary to fix the supporting-plate 13 at a desired adjustment, and thereby regulate the angle of the miter of the work. From the plate 13 also extends a smaller areuate slotted guide-plate 17, and a fastening member 18 is carried by the clamp member 2 and passes through the slot of the plate 17, which latter cooperates in the adjustment of the supporting-plate 13, above described. The plates 17 and 14 are mounted in the same relative plane, and by fixing the position of the supporting-plate 13 the work disposed thereon will be arranged at aperdetermined angle with reference to the members 2 and 3, and the said work will thus be cut at a suitable miter in a manner which will be readily understood. 1 In using the invention it is of course necessary to first adjust the plate 13, after which the actuating-bar 6 is grasped at the handle 19, and the teeth 6- thereof register with the longer portion of the recess .12, whereupon the bar 6 may be given a free longitudinal movement by forcing the clamp member 3 toward the member 2 and against the work which has previously been laid upoif the supporting-plate 13. The clamp member 3 is now tightened or firmly clamped against the work by giving the bar 6 a rotary movement, so as to throw the teeth thereof into the widened portion of the recess 12, said bar being thus interlocked with the sleeve 10, in/ which the recess 12 is provided. Further rotary movement of the bar 6 in the same direction will actuate or rotate the sleeve 10,\ and said sleeve will consequently be gradually moved in the head 8 toward the clamp member 3. The latter member 3, being swiveled to the bar 6, is actuated by the rotary movement of the bar and sleeve, said sleeve being actuated longitudinally in the head 8, and said member 3 is thus firmly clamped against the work to-hold it in proper position while it is being operated upon. 1 When the proper miter has been made upon the work, the bar 6' may be rotated slightly in the direction opposite to that above mentioned, and the teeth 6 when brought into register with the longitudinal longer portion of the recess 12 will' permit of a sliding movement of the bar 6 through the sleeve 10 in moving in the member 3 away from the member 2.

The jack device, as above described, is of comparativelysimple construction, and the gage means whereby the meter is determined may be quickly adjusted, as well as the clamp devices quickly operated to hold the work in proper position.

In Fig. 5 a slight modification of the form of the invention is set forth, the bar 6 being provided with oppositely-disposed sets of teeth 6, the interior of the sleeve 10 being also oppositely recessed, the above afi'ording av connection of increased substantiality de sirable under certain conditions of service.

Having thus described the invention, what is claimed as new is 1. A device of the character described comprising a frame, a fixed jaw mounted at one end of said frame, a movable jaw mounted on said frame, means for actuating the movable jaw toward and from the fixed jaw, a guideplate secured to the inner face of the fixed jaw and provided with a curved slot, a supporting-plate provided with a set-screw working in said slot and provided with a second guide-plate having a curved slot, and a setscrew working through the last-named slot and designed to hold said last-named plate in different adjusted positions.

2. A device of the character described comprising a longitudinally-slotted frame provided at one end with a fixed jaw and at the other end with a bearing-head, a movable jaw mounted to slide onsaid frame, an actuating-rod secured to said movable jaw and workin through said bearing-head, a slotted guidelate secured to one face of the fixed jaw, an angular supporting-plate provided with a set-screw working in the slot of said guide-plate and provided with a second curved and slotted guide-plate the end of which extends into the slot in the frame, and a second set-screw working in said lastnamed guide-plate and designed to clamp the latter in different adjusted positions, in connection with the other set-screw.

3. A device of the character described comprising a longitudinally-slotted frame provided at one end with a fixed jaw and at the other end with a bearing-head, a movable jaw provided with an extension fitted in said slot and with a plate bearing on the lower surface of the frame whereby said jaw is mounted to slide longitudinally on the frame, an actuating-rod for said movable jaw mounted in said bearing-head, a guide-plate 14 secured at one end to the inner face of the fixed jaw and provided With a curved slot, an angular supporting-plate provided at one end with an angular extension resting upon said guide-plate and provided also near its other end with a guide-plate having a curved slot,

and two set-screws working respectively through said angular extension into the slot of one guidelate and into the slot of the I5 fothii' guide-p ate, as and for the purpose set ort In testimony whereof I affix my signature in presence of two witnesses.

EDWARD O. WOLFE.

Witnesses J. F. KATZMAIER, CHARLES W. WOLFE. 

